When you move the mouse cursor, Alibre's 3D views highlight the face or edge closest to the cursor. In VMware, this red highlight would be stuck -- or rather, it would only turn ON, but never OFF.
The issue was present in every VMware 2 up to and including 2.0.5, and in every version of Alibre Design starting with at least 10. I only tried it on MBP with NVidia graphics, so it might have been an NVidia-only issue.
I was very nicely surprised after updating VMware to 2.0.6 today. Not only did networked Windows startup take perhaps 25% less time (somehow), but Alibre's workspace starts up much faster (feels like 50%) and the workspace display is bug-free, as far as I can tell.
This, coupled with significant speed improvements in Alibre 12, means that a very solid parametric CAD is available for OS X on Intel machines for ~$300 extra over the per-set price on Windows. That $300 factors in the eBay cost of Windows XP license, and the cost of a VMware license. Never mind that you could get a basic Alibre seat for $99 in a promotion that just expired a few days ago. Sweet!
Update: things still work just fine with Fusion 3.1.1 and Alibre Design 12.1 - as shown in the picture above.